Abstract: At approximately 2:40 p.m. on May 26,1993, an accident occurred at Laymac Morris Well #7, Bakersfield, CA. Employee #1 was injured while assisting an employee of Axelson, Inc., who was disassembling the insert pump that had been pulled from the well. The other employee used a 36-inch pipe wrench to back up the pump's barrel. He also used a 24-inch pipe wrench to loosen the top lock guide, so that the plunger could be removed from the pump. Employee #1 was holding up the pull rod with his boot while the Axelson employee unscrewed the top guide by hand. At that point, the pump exploded and Employee #1 was struck by the 24-inch pipe wrench. He was taken to Bakersfield Memorial Hospital for treatment of a broken (left) leg, ankles, skull, right thumb, and right forearm.